Letterheady

Letterheady is a site dedicated to interesting letterhead and official correspondence. There are currently about thirty pages of images and it includes stationery from political figures, pop culture icons and both popular and obscure companies. The collection is incredibly fascinating, I went through it in its entirety the first time I found the site.
Here are just a few of them...

Roy Lichtenstein, circa 1971

Charles and Diana, circa 1987

Muhammad Ali, circa 1975

Winston Churchill, circa 1940

Adolf Hitler, circa 1938

The Star Wars Corporation, circa 1976

The Office of Johnny Cash, circa 1960